--- a/debian/rules	2020-12-08 10:32:57.348147508 +0000
--- b/debian/rules	2020-12-08 10:48:31.343248606 +0000
@@ -34,3 +34,6 @@
 
 	#empty dependency_libs
 	sed -i "/dependency_libs/ s/'.*'/''/" `find . -name '*.la'`
+
+	# strip build path
+	sed -i 's@^\(#define PACKAGE_SOURCE_DIR\) .*@\1 "/dummy"@' `find . -name 'config.h'`